Half to george e



(No Model.)

W. E. WILD.

ORE GRUSHING MACHINE.

No. 331,017. Patented Nev. 24, 1885.

ATENI rricn.

WILLIAM E. IVILD, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE HALF TOGEORGE E. AMES, OF SAME PLACE.

ORE-CRUSHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 331,017, dated November24, 1885.

Application filed July 9,1885. Serial No. 171,129.

To aZZ whont it may concern:

Be it known that 1, WILLIAM E. WILD, of the city and county of SanFrancisco, State of California, have invented an Improvement inOre-Crushing Machines; and I hereby declare the following to be a full,clear, and exact description of the same.

My invention relates to certain improvements in ore-crushing machines;and it consists in a means for feeding ore to the cylinders andpreventing waste.

Referring to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view showing the rolls andthe feeding device. Fig. 2 is a vertical section through one side of thehopper.

In the former patent issued to me April 14., 1885, I have shown amachine for crushing ore, consisting of cylinders or rolls which rotatetoward each other, and various connected mechanism.

In my present invention, A A are the cylinders or rolls, which may bemade of cast-iron and secured to shafts, with gears or pulleys attached,so that they may be properly rotated. Around the outside of these rollsare fitted cylindrical shells of steel, which serve as shoes to crushthe ore passing between them, their faces rotating as nearly together asmay be required for the purpose. In order to feed the material to becrushed to these cylinders, I employ a hopper which is composed of twoends. H H, properly supported from the framework of the machine, so asto stand vertically at the ends of the cylinders and extend down withtheir concave lower edges approaching the curves of the exteriors of thecylinders where they run together, as shown in Fig. 1. These two endsare held together by a strong transverse bar or brace, I, which extendsbe- (No model.)

tween them and above the point where the rollers approach each other.

In order to prevent the material escaping between the ends of therollers and the ends H of the hopper, I fit adjustable plates J inopenings which are formed in the lower parts of said ends H, and theseplates may be moved inward, so as to fit closely against the moving endsof the rolls near their peripheries. These plates J are shaped, asshown, with the edges which fit against the rolls made concave, or

'With curves having the same radius as that of the rolls. These platesare cored out in the center, so that only the outer edges approach theends of the rolls, and this reduces the amount of Wearof the surface toa minimum. These plates are set up from time to time, so as to stand asnear the ends of the rolls as is suitable, to prevent the material whichis to be crushed from sifting out and escaping at the ends.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In an ore-crushing machine, the Vertical fixed ends H, supported fromthe frame of the machine, upon each side of the rolls and above theirmeeting point, and the transverse brace or support, in combination withthe adjustable plates J, and adj usting-screws, whereby they may be heldso as to .prevent the escape of the material at the ends of the rolls,substantially as herein described.

Inwitness whereof I have hereunto set my hand.

WILLIAM E. WILD.

Il itnesses:

S. H. N OURSE, 1-1. B. APPLEWHAI'IE.

